I just makes me SOOOO happy that tires rated to ONLY 168mph simply are unsuitable for my car... LOL.

I am a big T1s fan, and wish that had 19's to fit my wheels. I bought the PS2's instead and will install next week.

If anybody needs any spare 19" Yoko AVS Sports I will probably sell the set that is on there now. One rear has a bubble, but the other only has about 600 miles on it. and the 2 fronts are still very good with about 2k miles tops. 235/35's and 315/25/19's

dave w

 

Domain,

What do you think of the sizes that limitup uses for stock rims?

235/40ZR18 Front
315/30ZR18 Rear


Limitup,

Have you traked the tires? Did they really reduce the understeer? One would have thought that with the rear width increased more than the front, you would get MORE understeer. However, with more rubber to the ground on all four wheels, you can certainly carry more speed.

 

Second day on my new PS2's 225 and 295 XL's.
The car feels bouncier than the pzero's on rough streets.
May get more creaks over time?

Turn-in is sharper. Kinda catches me by surprise on my favorite on-ramps. I have to stop turning as much as I used to.

Seem to roll better than the pzeros.

Haven't pushed it real hard yet (I want this set to last).
I'll report back after I do my canyon run this weekend.

 

The PS2 295/30-18 is N2 and XL. They are XL because the rear of the turbo is so heavy. Each rear tire carries over 1050# vs 850# on a Corvette rear tire. The PS2 315/30-18 is .5" taller and .5" wider and fits a 10.5 - 11.5"rim. The 295 and 315 have the same load rating. The turbo front tires only carry 700# each.
I'm running Rosso's in the 235/315 size on stock rims with no problems. Clearance is fine with no spacers needed. Since the 235/315 combination was designed for the GT2 it should be an excellent combo for the turbo. The 315's help fill up the rear wheel well, improving appearance also.

 

ebaker and limitup,

With the 23/315 combination, do you feel more under steer or less comparing to the 225/295?

 

I went from Asimetricos to Rossos so it's hard to compare. The initial turn in is a little slower, but the overall stick once the car settles into the corner is better. I think the changes are more from the different sidewall construction, tread depth, and tread compounds than the size change. Overall understeer seems about the same.

 

Can we use 295/35/18 tires without any problems or do we need to stick to the 30 profile?

 

The 295/35-18 is about 1.1" too tall in the back (pretty significant).

I would stick with a 295/30-18 tire, or one that's around 25" in diameter.

- KJ

 

Scott, stock offset for my car is 225/285

 

Okay, so basically what I've gathered here so far is that the Michellin Pilot Sport 2's are the best tire but they don't make them in stock turbo sizes, correct?

 

They DO come in stock sizes for the front AND back.

It's just a choice between the 225/40-18 Front (NOT N-rated) or a 235/40-18 Front (N-rated and better help against understeer, but 8mm taller than stock).

- KJ

 

Weird... so Turbos have had different offsets?!?

Mine is definitely 295 in the rear.

I may start another thread to see what others have...



EDIT: Just noticed you have a 993 TT. hehe... Had me worried for a minute.

 

Another tire option that should be much cheaper than PS2's, but almost just as good are the Bridgestone S-03's.

They aren't listed in 996 TT sizes on Tirerack or Bridestone's website, but they are on the 996 TT Cab I just ordered, so I think they will be available SOON in N. America!

It'll be a great option if you don't want to go with PS2's!

- KJ

 

Given the same size, an XL rated tire is most likely to perform better when pushed hard. The XL rated tires exhibit less rolling under hard lateral pressure. So if using, say, a Pirelli; an XL rated Rosso will corner better than a standard load Rosso. But it will do it at the expense of ride quality. XL tires are stiffer.

To muddy the water even more, if comparing the PS2 in the front application to an XL, buy the N-spec. Why? Because Porsche is working with Michelin and tuning this tire to the handling characteristics of the car. Nobody else is doing this. The N-Spec and XL tire both show the same build layers (tread layers, sidewall reinforcements, etc). But I bet the PS2 rubber thickness may be slightly different in some areas to "tune" the tire to the car.

Wether or not the PS2 is stiffer than the XL (or vice-versa) in the same size can only be determined by driving the two tires side-by-side on the same car under the same conditions. We have not done this test, so I can't say for sure which of the two is better for your application. But I'd place my money on the N-spec if given the choice. Sorry if this is confusing, it can be difficult to explain when talking about fine tuning what is basically the same tire.....

 

I don't understand why people dislike the PZero so much! Granted I do not track my car very often, but on the street they seem to perform quite nicely. They also last an incredibly long time given the treadwear rating and high torque of the Turbo. My PZeros are going on 15K miles and they still have a couple thousand left in them. Incredible for Z rated tires!

My dad's CL600 has Dunlop SP9000's and he only gets around 10000 miles per set!